LeafKit is a templating language with Swift-inspired syntax.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Mar 18, 2026 · NIST NVD

   Detected

   LeafKit is a templating language with Swift-inspired syntax. Prior to version 1.14.2, HTML escaping doesn't work correctly when a template prints a collection (Array / Dictionary) via . This can result in XSS, allowing potentially untrusted input to be rendered unescaped. Version 1.14.2 fixes the issue.

2. Jun 17, 2026 · NIST NVD

   Updated

   LeafKit is a templating language with Swift-inspired syntax. Prior to version 1.14.2, HTML escaping doesn't work correctly when a template prints a collection (Array / Dictionary) via . This can result in XSS, allowing potentially untrusted input to be rendered unescaped. Version 1.14.2 fixes the issue.

Affected

• cpe vapor/leafkitversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-28499

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-28499

  LeafKit is a templating language with Swift-inspired syntax. Prior to version 1.14.2, HTML escaping doesn't work correctly when a template prints a collection (Array / Dictionary) via . This can result in XSS, allowing potentially untrusted input to be rendered unescape

  nvd.nist.gov

References

• Patch · github.com
• Release Notes · github.com
• Exploit · github.com